Any auto parts store should have a selection. I also would try McLendon's Hardward. When you tighen they enough they will bite. Daniel Stevens, KL7WM In a message dated 2/27/2013 7:25:25 P.M. Pacific Standard Time, me@bartk.us writes: I'm thinking about $2.50/ea would be nice. Muffler clamps are NOT adequate. Muffler clamps have 2 semi-circle contact surfaces, and if the pipe is slightly smaller than the clamp, this creates a 2-point contact which causes rocking action. Gross. The nice toothed and V-angled designs here are the bomb. Soup for scale. :) --Bart _______________________________________________ PSDR mailing list PSDR@hamwan.org http://mail.hamwan.org/mailman/listinfo/psdr_hamwan.org